Remove the call to OnCommitSuccess from tag creation

This is no change in behavior because OnCommitSuccess only clears the message
when the commit message panel was opened with preserveMessage=true, which it
isn't in the case of creating a tag.

And this is in fact the desired behavior, because we don't want creating a tag
to interfere with preserving commit messages in any way.

pkg/gui/controllers/helpers/tags_helper.go

@@ -34,7 +34,6 @@ func (self *TagsHelper) OpenCreateTagPrompt(ref string, onCreate func()) error {
 		}
 
 		return self.gpg.WithGpgHandling(command, git_commands.TagGpgSign, self.c.Tr.CreatingTag, func() error {
-			self.commitsHelper.OnCommitSuccess()
 			return nil
 		}, []types.RefreshableView{types.COMMITS, types.TAGS})
 	}